The concentrations of PAHs in this study ranged from 279 to 1243 ng m−3, with an average concentration of 514 ng m−3. With respect to PAHs, Nap was the most dominant compound (69.1–81.6%), followed by the three-ring Phe (6.45–14.5%). The LMW PAHs (the sum of two- and three-ring PAHs) constituted more than 90% of the total PAHs. The analytical results demonstrate that the PAHs had a topical petrogenic origin. The calculated MDR ratios showed that only the Ant/(Ant + Phe) ratios were consistent with the state of petrochemical PAH pollution because the ratios were less than 0.1 in all sites.